let user = {
  show() {
    return this.name;
  },
  addr: 'user addr'
};
let hd = Object.create(user, {
  name: {
    value: "后盾人"
  },
  addr : {
  	value: 'hd addr'
  },
  show: {
  	value:function() {
	  	return ' show ..'
	  }
  }
});
console.log(hd);


hd.name = "向军";
console.log(hd.show());
console.log(Object.getPrototypeOf(hd) == user)
console.log(hd.__proto__ == user)
